openbox/focus.c

   1 #include "openbox.h"
   2 #include "client.h"
   3 #include "screen.h"
   4 #include "prop.h"
   5 #include "dispatch.h"
   6
   7 #include <X11/Xlib.h>
   8 #include <glib.h>
   9
  10 Client *focus_client = NULL;
  11 GList **focus_order = NULL; /* these lists are created when screen_startup
  12                                sets the number of desktops */
  13
  14 Window focus_backup = None;
  15
  16 void focus_set_client(Client *client);
  17
  18 void focus_startup()
  19 {
  20     /* create the window which gets focus when no clients get it. Have to
  21        make it override-redirect so we don't try manage it, since it is
  22        mapped. */
  23     XSetWindowAttributes attrib;
  24
  25     attrib.override_redirect = TRUE;
  26     focus_backup = XCreateWindow(ob_display, ob_root,
  27                                  -100, -100, 1, 1, 0, 0, InputOnly,
  28                                  CopyFromParent, CWOverrideRedirect, &attrib);
  29     XMapRaised(ob_display, focus_backup);
  30
  31     /* start with nothing focused */
  32     focus_set_client(NULL);
  33 }
  34
  35 void focus_shutdown()
  36 {
  37     guint i;
  38
  39     for (i = 0; i < screen_num_desktops; ++i)
  40         g_list_free(focus_order[i]);
  41     g_free(focus_order);
  42
  43     XDestroyWindow(ob_display, focus_backup);
  44
  45     /* reset focus to root */
  46     XSetInputFocus(ob_display, PointerRoot, RevertToNone, CurrentTime);
  47 }
  48
  49 void focus_set_client(Client *client)
  50 {
  51     Window active;
  52     Client *old;
  53     guint desktop;
  54
  55     /* uninstall the old colormap, and install the new one */
  56     screen_install_colormap(focus_client, FALSE);
  57     screen_install_colormap(client, TRUE);
  58
  59
  60     if (client == NULL) {
  61         /* when nothing will be focused, send focus to the backup target */
  62         XSetInputFocus(ob_display, focus_backup, RevertToNone, CurrentTime);
  63     }
  64
  65     old = focus_client;
  66     focus_client = client;
  67
  68     /* move to the top of the list */
  69     if (client != NULL) {
  70         desktop = client->desktop;
  71         if (desktop == DESKTOP_ALL) desktop = screen_desktop;
  72         focus_order[desktop] = g_list_remove(focus_order[desktop], client);
  73         focus_order[desktop] = g_list_prepend(focus_order[desktop], client);
  74     }
  75
  76     /* set the NET_ACTIVE_WINDOW hint */
  77     active = client ? client->window : None;
  78     PROP_SET32(ob_root, net_active_window, window, active);
  79
  80     if (focus_client != NULL)
  81         dispatch_client(Event_Client_Focus, focus_client, 0, 0);
  82     if (old != NULL)
  83         dispatch_client(Event_Client_Unfocus, old, 0, 0);
  84 }